/*!	 valuenode_boneinfluence.h
**	 Header file for implementation of the "BoneInfluence" valuenode conversion.
**
**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
*/

#ifndef __SYNFIG_VALUENODE_BONEINFLUENCE_H
#define __SYNFIG_VALUENODE_BONEINFLUENCE_H

#include <synfig/valuenode.h>
#include <synfig/matrix.h>

namespace synfig
{

class ValueNode_BoneInfluence : public LinkableValueNode
{
    ValueNode::RHandle bone_weight_list_;
    ValueNode::RHandle link_;

    mutable Matrix transform_, inverse_transform_;
    mutable bool checked_inverse_, has_inverse_;

public:
    typedef etl::handle<ValueNode_BoneInfluence> Handle;
    typedef etl::handle<const ValueNode_BoneInfluence> ConstHandle;

    ValueNode_BoneInfluence(Type &x);

    ValueNode_BoneInfluence(const ValueNode::Handle &x, etl::loose_handle<Canvas> canvas);

//	static Handle create(Type &x);
//	static Handle create(const ValueNode::Handle &x);

    virtual ValueNode::LooseHandle get_link_vfunc(int i)const;

    virtual ValueBase operator()(Time t)const;

    virtual ~ValueNode_BoneInfluence();

    virtual String get_name()const;

    virtual String get_local_name()const;

protected:
    virtual bool set_link_vfunc(int i, ValueNode::Handle x);

    LinkableValueNode* create_new()const;

public:
    using synfig::LinkableValueNode::set_link_vfunc;
    static bool check_type(Type &type);
    virtual Vocab get_children_vocab_vfunc()const;
    static ValueNode_BoneInfluence* create(const ValueBase &x, etl::loose_handle<Canvas>);

    Matrix calculate_transform(Time t)const;
    Matrix& get_transform(bool rebuild = false, Time t = 0)const;
    void set_transform(Matrix transform)const
    {
        transform_ = transform;
        checked_inverse_ = false;
    }
    bool has_inverse_transform()const;
    Matrix& get_inverse_transform()const;

}; // END of class ValueNode_BoneInfluence

}; // END of namespace synfig

#endif